Jas, great job putting these templates together. I think it will go well with products like Customer.io. That said, I strongly feel that drip mail is only secondary to user onboarding in web apps.
If a user that's just signed up and has high expectations for the product to deliver, product owners need to engineer success while the user is still in the web app. If confusion settles in, follow up email will work to remedy this missed opportunity.
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